Needle cooling apparatus



April 13, 1943. A. J. GIGLIO 2 31 NEEDLE COOLING APPARATUS Q Filed Jan.13, 1942 ATTORNEYS Patented Apr. 13, 1943 Antonio John "Giglio, BronxQN.Y., assignor to Premier Thread Gompany, a corporation of Rhode IslandApplication Januaryl13, 1942, Serial rim-426,609

4 Claims.

This invention relates to a sewing machine,

and is a continuation in part of my prior application, Serial No.418,250), filed "November '7,

1914 1, and has many of the same objects-in view ,as said application.

In the use :of a fluid or "liquid'coolant in connection with .a sewingmachine for the cooling of the reciprocating needle, some diflicultyfre- 'quently occurs in stopping the flow-of the coolant when thereciprocating needlestops for the various requirements instopping themachine while the work progresses.

One of the objects of this invention is to ,actively convey the fluid bymeans whichactuate the reciprocating needle so that when the needleceases to operate the fluid also ceases to flow to cool the needle, andthus the fluid will not flow at times when undesired.

Another object of this invention is to provide a cooling arrangementwhich may act by a direct fluid discharge from the end of a conduitwithout the need of some absorbing means for collecting this fluid andthen transferring it to the needle.

With these and other objects in view, the in vention consists of certainnovel features of construction, as will be more fully described andparticularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is an elevation of a sewing machine showing a fluid reservoir andconveying means for the fluid from the reservoir to the needle, theparts being broken away and shown in section for clarity.

Fig. 2 is a view on a larger scale lookingat the end of the machine andshowing the reciprocating needle and the foot portion of the machinewith the fluid nozzle shown as carried by this foot portion.

Fig. 3 is a section on line 3-3 of Fig. 2.

Fig. 4 is a top plan view of the gear pump portion of the arrangementshown in Fig. 1.

Fig. 5 is a perspective View of a modified form of foot which may beused on a machine of this character.

In proceeding with this invention the basic consideration is that ofapplying some fluid to the reciprocating needle which will disperse heator evaporate and by means of its evaporation absorb the heat and morequickly cool the needle than heat would be radiated from the needle orthe yarn. One of the most convenient ways which I have found ofaccomplishing this result is to convey fluid from a nozzle directly ontothe reciprocating needle in proximity to the position 'of the needle asit passes through the work in order that the needlemay become-wet andevaporate and disperse the "heat of the needle. I :have positioned areservoir for the fluid at a level below that :of the needle andutilized the actuating mechanism for the needlefor also actuating a pumpto convey the liquid from the reservoir to the needle, .so that whenthe-needle isstopped the pump which supplies the :fluid will .also stop.and no fluid will flow.

With reference more particularly .to the draw- .ing, Ill designatesgenerally the irame work of the-sewing machine with a standard portion.H andoverhangihg arm I 2. A foot-designated generally -,I-3' is carriedby a reciprocating member 14 to which .it'iis held by the clamp 31.5.'This fact has the usual :function in connection with pressing upon andfeeding the work. The reciprocating guide rod [6 carries the needle I!by means of the clamp I 8 and passes through the bifurcated foot IS inthe usual manner. The thread 20 leads from the package 2| over thetension guides 22, 23, 24, 25, 26 to the eye of the needle, also in amanner well known in sewing machine operation. A flywheel 21 on the mainshaft of the machine is driven by a pulley 28 and belt 29, which belt isin turn driven by some suitable source of power, such for instance aselectric motor, stationed below the machine and not shown in thisillustration.

Supported on the table 30 of the machine is a reservoir 3| in whichthere is located some suitable liquid coolant fluid 32, such forinstance as water. This reservoir depends from the table 30 upon whichthe sewing machine is mounted, and thus is lower than the level of thereciproeating needle. The gear pump designated generally 33 is shown asmounted upon the table 30 and is connected to the reservoir 32 by aconduit 34 leading to the inlet side of the gear pump 33 while a conduit33 leads from the outlet side of the gear pump to the tube 31 extendingfrom the block 38 in which there is a passage 39 controlled by the valve49, having a spring 4| and knurled thumb screw or head 42, whereby theamount of fluid passing this point may be definitely controlled. Thenozzle 43 extends from the block 38 and has its discharge end 4|]adjacent to the point where the needle passes into the work. A suitableholder 44, or strap, about the overarm l2 serves to support the conduit36 in desired position.

The gear pump 33 has a pulley 45 on its drive shaft 46 whichpulley ispositioned so as to receive in its groove the belt 29 which drives thepulley 28 and by reason of the belt contactin this pulley 45 this gearpump is driven so as to draw fluid 32 from the reservoir 3| through thepipe 34 and force it through the pump and through the pipe 36 so as todischarge at the nozzle 41.

A modified form of foot is designated in Fig. 5, this type being such asis usually used in sewing leather. Here the foot is circular as at 50having a knurled work-engaging portion 5| and is provided with an axialopening 52 which aligns with a suitable conduit 53 extending axiallythrough this foot and through the support 54 which is also provided withan arm 55 for holding the valvev 56 similar to the valve shown in Fig. 3for controlling the conduit 36 heretofore explained. This valve iscontrolled by the thumb nut 42 and has a coiled spring 4| about itsthreaded portion 40 as shown in Fig. 3.

By the arrangement which I have here shown, when the reciprocatingneedle stops for any reason the supply of coolant fluid also stops, inasmuch as the belt which actuates the reciprocating needle also actuatesthe pump which causes the supply of coolant to be moved from thereservoir to the needle.

I claim:

1. In a sewing machine, a reciprocating needle, a belt for actuating thesame, a presser foot, a liquid coolant reservoir below the level of theneedle, a conduit from said reservoir extending through said presserfoot and opening at a location facing said needle and adjacent theretoand a pump driven by said belt for forcing the coolant through saidconduit into contact with the needle whereby upon stopping of themovement of the needle the coolant supply stops.

2. In a sewing machine, a reciprocating needle,

a presser foot, a fluid coolant reservoir, a conduit from said reservoirextending through said presser foot and opening at a location facingsaid needle and closely adjacent thereto, a pump interposed in saidconduit for forcing fluid through said conduit to said needle, and avalve in said conduitv for controlling the flow of fluid through saidconduit.

3. In a sewing machine, a reciprocating needle, a presser foot having anopening through which said needle passes, a liquid coolant reservoirsecured to said machine, a conduit from said reservoir extending throughsaid presser foot and opening at a location facing said needle andclosely adjacent thereto, a pump interposed in said conduit forforcingthe coolant through said conduit to said needle, a valve in said conduitadjustable for controlling the flow of fluid through said conduit andmeans for operating said pump from the driving belt'of said machine.

4. In a sewing machine, a reciprocating needle, mechanism for operatingsaid needle, a belt for actuating said mechanism, a presser foot havingan opening through which said needle passes, a liquid coolant reservoirsecured to and depending from the table top of said machine, a conduitfrom said reservoir extending through said presser foot and opening at alocation facing said needle and closely adjacent thereto, a pumpinterposed in said conduit and having a pulley thereon positioned at alocation to be engaged by said belt for actuating said pump for forcingliquid through said conduit to said needle.

ANTONIO JOHN GIGLIO.

